वैश्विक स्तर पर प्रतिवर्ष 'विश्व कंप्यूटर साक्षरता दिवस' किस दिन मनाया जाता है?

In which year did the Government of India declare Swami Vivekananda's birth anniversary as National Youth Day?

On which date is National Youth Day observed in India to mark the birth anniversary of Swami Vivekananda?